SE442414B - SETTING TO REDUCE OR INHIBIT THE MARKING OF PASS OR PAPER IN BACKWATER SYSTEM - Google Patents
SETTING TO REDUCE OR INHIBIT THE MARKING OF PASS OR PAPER IN BACKWATER SYSTEMInfo
- Publication number
- SE442414B SE442414B SE8105591A SE8105591A SE442414B SE 442414 B SE442414 B SE 442414B SE 8105591 A SE8105591 A SE 8105591A SE 8105591 A SE8105591 A SE 8105591A SE 442414 B SE442414 B SE 442414B
- Authority
- SE
- Sweden
- Prior art keywords
- paper
- oxygen
- marking
- inhibit
- pass
- Prior art date
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 11
- 229910052760 oxygen Inorganic materials 0.000 abstract description 10
- 239000001301 oxygen Substances 0.000 abstract description 10
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 9
- 239000000126 substance Substances 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000004040 coloring Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 abstract 1
- 230000005764 inhibitory process Effects 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 241001148471 unidentified anaerobic bacterium Species 0.000 description 3
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 2
- MBMLMWLHJBBADN-UHFFFAOYSA-N Ferrous sulfide Chemical compound [Fe]=S MBMLMWLHJBBADN-UHFFFAOYSA-N 0.000 description 2
- 229920001131 Pulp (paper) Polymers 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052976 metal sulfide Inorganic materials 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 229910021653 sulphate ion Inorganic materials 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 241000605716 Desulfovibrio Species 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 241000218657 Picea Species 0.000 description 1
- DWAQJAXMDSEUJJ-UHFFFAOYSA-M Sodium bisulfite Chemical compound [Na+].OS([O-])=O DWAQJAXMDSEUJJ-UHFFFAOYSA-M 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004061 bleaching Methods 0.000 description 1
- 230000005587 bubbling Effects 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 230000001143 conditioned effect Effects 0.000 description 1
- BUACSMWVFUNQET-UHFFFAOYSA-H dialuminum;trisulfate;hydrate Chemical compound O.[Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O BUACSMWVFUNQET-UHFFFAOYSA-H 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000011173 large scale experimental method Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 238000006053 organic reaction Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 150000002926 oxygen Chemical class 0.000 description 1
- 239000013055 pulp slurry Substances 0.000 description 1
- 235000010267 sodium hydrogen sulphite Nutrition 0.000 description 1
- 239000004289 sodium hydrogen sulphite Substances 0.000 description 1
- 238000010186 staining Methods 0.000 description 1
- 150000004763 sulfides Chemical class 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F1/00—Wet end of machines for making continuous webs of paper
- D21F1/66—Pulp catching, de-watering, or recovering; Re-use of pulp-water
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S210/00—Liquid purification or separation
- Y10S210/928—Paper mill waste, e.g. white water, black liquor treated
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Paper (AREA)
- Medicines Containing Plant Substances (AREA)
- Carbon And Carbon Compounds (AREA)
Abstract
Description
z 8105591-5 ständigt upprätthålles i vattnet eller att vattnet icke under_ någon längre tid är väsentligen syrefritt. Tillfredsställande resultat uppnås, om vattnet minst en gång under cirkulationen tillföres syre i sådan mängd, att ett väsentligt överskott syre kvarstår åtminstone omedelbart efter tillsatsstället, t ex upp till 1 timme efter tillsatsen eller åtminstone i cirka 20 minuter. z 8105591-5 is constantly maintained in the water or that the water is not substantially free of oxygen for any length of time. Satisfactory results are obtained if the water is supplied with oxygen at least once during the circulation in such an amount that a substantial excess of oxygen remains at least immediately after the addition site, for example up to 1 hour after the addition or at least for about 20 minutes.
Det har visat sig, att denna syretillsats icke verkar såsom blekkemikalie, d v s den nedbryter icke bildade organiska reak- tionsprodukter. Det synes istället som om mekanismen vid denna mörkfärgning och dess undanröjande ligger i att metaller, fram- för allt järn, som utlöses från processapparaturen under massans, mäldens eller vattnets cirkulation, reagerar med sulfider, spe- ciellt vätesulfid, under bildning av metallsulfider, såsom järn- sulfid. Metallerna kan naturligtvis även komma från andra källor, t ex vedsubstansen. Svavel förefinnes framför allt såsom sulfat och tillföres oftast processen i olika former, t ex svavelsyra, natriumbisulfit och aluminiumsulfat. Framför allt sulfatet torde under inverkan av anaeroba bakterier, såsom sådana från gruppen desulfovibrio-bakterier, bilda vätesulfid. Mekanismen torde så- lunda vara en helt annan än en termiskt betingad oxidation. Detta förklarar även varför denna mörkfärgning tidigare icke varit be- svärande i någon högre grad. Denna slutning av processystemen, som nu blivit följden av bland annat ökade fordringar på avlopps- rening i fabrikerna, har emellertid ökat halten lösta, organiska ämnen i systemet. Dessa oxideras lätt och därvid förbrukas det fria syre, som eventuellt kan förefinnas, varigenom livsbetingel- ser åstadkommes för anaeroba bakterier. Dessa organiska ämnen är dessutom lämpliga såsom näring för dessa bakterier.It has been found that this oxygen additive does not act as an bleaching chemical, i.e. it decomposes non-formed organic reaction products. Instead, it seems that the mechanism of this dark staining and its elimination lies in the fact that metals, especially iron, which are released from the process equipment during the circulation of pulp, stock or water, react with sulphides, especially hydrogen sulphide, to form metal sulphides, such as ferrous sulfide. The metals can of course also come from other sources, such as the wood substance. Sulfur is mainly present as sulphate and is usually added to the process in various forms, for example sulfuric acid, sodium bisulphite and aluminum sulphate. In particular, the sulphate should form hydrogen sulphide under the influence of anaerobic bacteria, such as those from the group of desulfovibrio bacteria. The mechanism should thus be a completely different one than a thermally conditioned oxidation. This also explains why this dark coloring has not previously been troublesome to any great extent. However, this closure of the process systems, which has now been the result of, among other things, increased receivables for sewage treatment in the factories, has increased the content of dissolved, organic substances in the system. These are easily oxidized and thereby consume the free oxygen that may be present, whereby living conditions are created for anaerobic bacteria. In addition, these organic substances are suitable as nutrients for these bacteria.
Genom föreliggande uppfinning synes de anaeroba bakteriernas livscykel brytas, varigenom i hög grad bildningen av mörkfärgan- de metallsulfider, speciellt järnsulfid, minskas.The present invention appears to disrupt the life cycle of the anaerobic bacteria, thereby greatly reducing the formation of dark-colored metal sulfides, especially iron sulfide.
Försök i stor skala har genomförts, varvid termomekanisk massa i en koncentration av cirka 1% transporterats en sträcka av cirka 8 km i en sluten rörledning. Den termomekaniska massan var framställd från huvudsakligen granved. Transportmängden ut- gjordes av 25 m3/min varav 19 m3/min återfördes och ånyo användes såsom transportvatten; återstoden leddes till avlopp efter rening.Large-scale experiments have been carried out, in which thermomechanical pulp in a concentration of about 1% has been transported a distance of about 8 km in a closed pipeline. The thermomechanical pulp was made mainly of spruce wood. The transport volume consisted of 25 m3 / min of which 19 m3 / min was recycled and again used as transport water; the residue was led to sewage after treatment.
Typiska analyser visar en sockerhalt av 100-200 mg/1, t ex 110- 150 mg/1, ett väsentligen neutralt pH, t ex 5-7, t ex 6,2-6,7, en S04-halt av 100-1000 mg/1, t ex 250-700 mg/1, en Fe-halt av 10 8105591-5 5 0,5-2,0 mg/1, t ex 1,0-1,5 mg/1 och en Cu-halt av 0,5-1,5 mg/1, t ex 0,6-1,2 mg/1. Dessa halter var väsentligen lika i såväl massauppslamningen som transportvattnet.Typical assays show a sugar content of 100-200 mg / l, eg 110-150 mg / l, a substantially neutral pH, eg 5-7, eg 6.2-6.7, an SO4 content of 100- 1000 mg / l, eg 250-700 mg / l, an Fe content of 0.5-2.0 mg / l, eg 1.0-1.5 mg / l and a Cu content of 0.5-1.5 mg / l, eg 0.6-1.2 mg / l. These levels were essentially the same in both the pulp slurry and the transport water.
Utan användning av föreliggande uppfinning sjönk massans ljushet från framställníngsstället till avvattningsstället från cirka 59 till cirka 56 enheter, d v s en minskning av cirka 5%.Without the use of the present invention, the brightness of the pulp dropped from the production site to the dewatering site from about 59 to about 56 units, i.e. a decrease of about 5%.
Vid försök med syretillsats genøm genombubblíng av ren syrgas i sådan mängd (ca 20 g 02 per ms vatten), att fritt syre kunde påvisas i vattnet cirka 6 km efter tillsatsstället, upprätthöll väsentligen samma vithet (mellan 57 och 58 enheter) vid såväl framställningsstället som avvattníngsstället.In experiments with oxygen addition by bubbling pure oxygen in such an amount (about 20 g O 2 per ms of water) that free oxygen could be detected in the water about 6 km after the addition site, essentially maintained the same whiteness (between 57 and 58 units) at both the production site and drainage point.
Claims (1)
Priority Applications (11)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE8105591A SE442414B (en) | 1981-09-22 | 1981-09-22 | SETTING TO REDUCE OR INHIBIT THE MARKING OF PASS OR PAPER IN BACKWATER SYSTEM |
| US06/498,199 US4532007A (en) | 1981-09-22 | 1982-09-20 | Use of substances giving off oxygen in reduction of dark coloring of pulp |
| AU89591/82A AU560874B2 (en) | 1981-09-22 | 1982-09-20 | Use of substances giving off oxygen in reduction of dark colouring of pulp |
| PCT/SE1982/000286 WO1983001080A1 (en) | 1981-09-22 | 1982-09-20 | Use of substances giving off oxygen in reduction of dark colouring of pulp |
| AT82850185T ATE22135T1 (en) | 1981-09-22 | 1982-09-20 | USE OF OXYGEN RELEASING SUBSTANCES TO REDUCE DARK COLOR OF PULP. |
| EP82850185A EP0076788B1 (en) | 1981-09-22 | 1982-09-20 | Use of substances giving off oxygen in reduction of dark colouring of pulp |
| JP57503017A JPS58501546A (en) | 1981-09-22 | 1982-09-20 | How to use oxygen-releasing materials in reducing pulp darkening |
| DE8282850185T DE3273203D1 (en) | 1981-09-22 | 1982-09-20 | Use of substances giving off oxygen in reduction of dark colouring of pulp |
| CA000411729A CA1200353A (en) | 1981-09-22 | 1982-09-20 | Process for minimizing discolouration in pulping systems |
| NO831621A NO156907C (en) | 1981-09-22 | 1983-05-06 | USE OF SUBSTANCES WHICH EXHAUST THE OXYGEN BY REDUCING MASS COLOR COLOR. |
| FI831757A FI78752C (en) | 1981-09-22 | 1983-05-18 | ANALYZING AV SYREAVGIVANDE SUBSTANSER FOER ATT REDUCERA MOERKFAERGNING AV PAPPERSMASSAN. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE8105591A SE442414B (en) | 1981-09-22 | 1981-09-22 | SETTING TO REDUCE OR INHIBIT THE MARKING OF PASS OR PAPER IN BACKWATER SYSTEM |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| SE8105591L SE8105591L (en) | 1983-03-23 |
| SE442414B true SE442414B (en) | 1985-12-23 |
Family
ID=20344604
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE8105591A SE442414B (en) | 1981-09-22 | 1981-09-22 | SETTING TO REDUCE OR INHIBIT THE MARKING OF PASS OR PAPER IN BACKWATER SYSTEM |
Country Status (10)
| Country | Link |
|---|---|
| US (1) | US4532007A (en) |
| EP (1) | EP0076788B1 (en) |
| JP (1) | JPS58501546A (en) |
| AT (1) | ATE22135T1 (en) |
| AU (1) | AU560874B2 (en) |
| CA (1) | CA1200353A (en) |
| DE (1) | DE3273203D1 (en) |
| FI (1) | FI78752C (en) |
| SE (1) | SE442414B (en) |
| WO (1) | WO1983001080A1 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4756800A (en) * | 1986-09-03 | 1988-07-12 | The United States Of America As Represented By The Secretary Of Agriculture | Method for producing salts of monoperoxysulfuric acid and simultaneously bleaching pulp |
| US5242593A (en) * | 1988-12-09 | 1993-09-07 | Oberkofler Joerg | Method for reducing the build-up of slime and/or film in water circulation systems |
| US5194163A (en) * | 1991-03-08 | 1993-03-16 | Fmc Corporation | Purification of waste streams |
| US5190669A (en) * | 1991-03-08 | 1993-03-02 | Fmc Corporation | Purification of waste streams |
| FI110533B (en) * | 2000-05-04 | 2003-02-14 | Aga Ab | Procedure for preventing the proliferation of microbes |
| FI20025023A (en) * | 2001-08-21 | 2003-02-22 | Liqum Oy | Process of a paper or cellulose process to check chemical status in a pulp and backwater system |
| PL2570550T3 (en) * | 2011-09-15 | 2016-03-31 | Linde Ag | Oxygen treatment of water and pulp from paper or cardboard production |
| DE102011083709A1 (en) * | 2011-09-29 | 2013-04-04 | Voith Patent Gmbh | Operating procedure for a stock preparation |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE745207C (en) * | 1938-06-29 | 1944-03-01 | Degussa | Process for cleaning pulp containing Trueben, such. B. Waste water from papermaking |
| BE517333A (en) * | 1952-02-02 | |||
| US3578610A (en) * | 1960-11-30 | 1971-05-11 | United Aircraft Corp | Process for fabrication of stoichiometric uranium monocarbide |
| US3405030A (en) * | 1965-05-20 | 1968-10-08 | Harry E. Morter | Method of determining and controlling microbial activity in aqueous paper machine systems |
| US3405930A (en) * | 1965-12-09 | 1968-10-15 | Chester I. Williams | Articulating clamp for securing form panels in rectangular configuration |
| US3514278A (en) * | 1968-01-08 | 1970-05-26 | Betz Laboratories | Slime control agent and methods of application |
| FR1599588A (en) * | 1968-12-30 | 1970-07-15 | ||
| US3576710A (en) * | 1969-07-28 | 1971-04-27 | Cons Paper Inc | Brightening of white water sludge |
| US3876497A (en) * | 1971-11-23 | 1975-04-08 | Sterling Drug Inc | Paper mill waste sludge oxidation and product recovery |
| DE2905936B1 (en) * | 1979-02-16 | 1980-04-30 | Degussa | Process for lightening and deodorising sulfate pulp |
| DE3019519B1 (en) * | 1980-05-22 | 1981-02-12 | Degussa | Process for the deodorization of sulfate pulp |
-
1981
- 1981-09-22 SE SE8105591A patent/SE442414B/en unknown
-
1982
- 1982-09-20 US US06/498,199 patent/US4532007A/en not_active Expired - Fee Related
- 1982-09-20 JP JP57503017A patent/JPS58501546A/en active Pending
- 1982-09-20 EP EP82850185A patent/EP0076788B1/en not_active Expired
- 1982-09-20 CA CA000411729A patent/CA1200353A/en not_active Expired
- 1982-09-20 AU AU89591/82A patent/AU560874B2/en not_active Ceased
- 1982-09-20 WO PCT/SE1982/000286 patent/WO1983001080A1/en active IP Right Grant
- 1982-09-20 DE DE8282850185T patent/DE3273203D1/en not_active Expired
- 1982-09-20 AT AT82850185T patent/ATE22135T1/en not_active IP Right Cessation
-
1983
- 1983-05-18 FI FI831757A patent/FI78752C/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| EP0076788A1 (en) | 1983-04-13 |
| FI831757L (en) | 1983-05-18 |
| FI78752B (en) | 1989-05-31 |
| FI831757A0 (en) | 1983-05-18 |
| AU560874B2 (en) | 1987-04-16 |
| EP0076788B1 (en) | 1986-09-10 |
| US4532007A (en) | 1985-07-30 |
| SE8105591L (en) | 1983-03-23 |
| JPS58501546A (en) | 1983-09-16 |
| AU8959182A (en) | 1983-04-08 |
| WO1983001080A1 (en) | 1983-03-31 |
| DE3273203D1 (en) | 1986-10-16 |
| ATE22135T1 (en) | 1986-09-15 |
| FI78752C (en) | 1989-09-11 |
| CA1200353A (en) | 1986-02-11 |
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